SAE Update - November 2024 - 41

SAE J2954, the final step for
commercializing wireless charging
STANDARDS & COMMITTEES
The SAE WPT-TF, with this
comprehensive set of data and
information, carried out a
decision poll; out of 60 voters,
75% favored DIPS as the
common alignment method for
public infrastructure in the lightduty
vehicle standard. The
choice was based on these test
results, technology readiness
level, and industry feedback.
Therefore, the latest SAE J2954
standard includes DIPS as the
common standardized
alignment methodology for
WPT.
" With over two decades of
experience in wireless power
transfer, ifak e.V. was enlisted by
SAE to carry out the SAE J2954
alignment witness tests for their
standard. We were honored to
assist in this crucial step in
helping to harmonize global
standardization of WPT for
EVs, " stated Maximilian
Hollenbach, research associate
for ifak (Institut für Automation
und Kommunikation e.V) of
Magdeburg, Germany. " As a
result of the field testing, data
taken, and feedback from the
SAE WPT-TF, it was found that
the differential inductive
positioning system (DIPS) has
proven to be a mature
UPDATE
technology capable of satisfying all requirements of
the SAE J2954 alignment. DIPS gives fast and precise
feedback to the driver while being resilient against
numerous extreme environmental conditions. "
" The next generation of EV charging can be as
simple as parking in a spot, with automated wireless
charging using SAE J2954. " stated Jesse Schneider,
CEO/CTO of ZEV Station and chair of the SAE WPTTF.
" The SAE WPT Taskforce has extensively tested
wireless power transfer and alignment from the lab to
the field, allowing safe wireless power transfer up to 11
kW with efficiencies up to 93%. The new standard
gives consistent alignment to an exact parking spot
with the DIPS system. This will enable seamless
wireless charging and parking, even for autonomous
vehicles in rain and snow. With the new SAE J2954
standard, the team has solved the missing link,
enabling the start of commercialization of wireless
charging for EVs-a gamechanger. "
Though it took more than a decade to arrive at the
point of decision to determine an alignment method
for WPT, SAE has carried out a transparent and databased
consensus process leading to a clear direction
for standardizing the alignment method as well as
wireless charging. This groundbreaking publication of
the SAE J2954 standard will lay the framework for
commercialization of light-duty wireless charging
worldwide for plug-in EVs as well as autonomous
vehicles.
Looking to the future, the SAE WPT-TF is currently
working on higher WPT power classes up to 500 kW
in the heavy-duty recommended practice SAE
J2954/2 and dynamic WPT in SAE J2954/3. n
By Jesse Schneider, ZEV Station; Ky Sealy, WiTricity;
Maximilian Hollenbach, ifak; Mike Böttigheimer, Timo Lämmle;
Simon Joos, MAHLE Powertrain; Ivo Teerlinck, Toyota Motor;
Bastian Rappholz, Siemens; and Andreas Wendt, Electreon.
November 2024
41
https://www.sae.org/standards/content/j2954/2_202212/ https://www.sae.org/standards/content/j2954/2_202212/
SAE Update - November 2024

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